Which supplement works better to increase testosterone: d-aspartic acid or tongkat ali (eurycoma longifolia)?

Ratings at a Glance

Supplement	Effectiveness Rating	Confidence Rating
D-Aspartic Acid
Tongkat Ali (Eurycoma Longifolia)

Effectiveness Rating: D-Aspartic Acid vs Tongkat Ali (Eurycoma Longifolia)

The effectiveness rating is a measure of the supplements' ability to increase testosterone. This rating answers the question of whether or not a supplement does what it claims. The evidence backing up tongkat ali (eurycoma longifolia) to increase testosterone is much better than the evidence backing up d-aspartic acid. Tongkat Ali (Eurycoma Longifolia) should provide positive results while d-aspartic acid will not.

Confidence Rating: D-Aspartic Acid vs Tongkat Ali (Eurycoma Longifolia)

Another factor to take into account when comparing supplements is the confidence rating. This rating is a measure of how valid each supplement's effectiveness rating is. Remember, the confidence rating is a measure of how much you can trust the effectiveness rating. This rating is based on how many studies are included in the database on a supplement's claims. Ideally, you want a high effectiveness AND confidence rating.

Both d-aspartic acid and tongkat ali (eurycoma longifolia) have low confidence ratings. This means neither supplement has an adequate amount of research to back up this claim. A low confidence rating questions the validity of the effectiveness rating.